Discharge tube comprising a metal envelope and for use at very short wave-lengths



Feb. 2, 1954 GELO 2,668,256

E. G. DOR DISCHARGE TUBE COMPRISING A METAL ENVELOPE AND FOR USE AT VERYSHORT WAVE-LENGT-HS Filed July 8, 1952 //V VEA/ 7'01? 5 01/4/20GER/MKDUS DORGELO Patented Feb. 2, 1954 2,668,256

UNITED STATES PATENT OFFICE DISCHARGE TUBE COMPRISING A METAL ENVELOPEAND FOR USE AT VERY SHORT WAVE-LENGTHS Eduard Gerhardus Dorgelo,Eindhoven, Netherlands, assignor to Hartford National Bank and TrustCompany, Hartford, Conn., as trustee Application July 8, 1952, SerialNo. 297,681

Claims priority, application Netherlands July 17, 1951 1 Claim. (01.313-313) 1 This invention relates to discharge tubes combetween thelead-in ir a d th t l t b prising a metal envelope and for use at veryenvelope.

short wavelengths. A proposed tube comprises a The invention will now bedescribed with referglass protective hood surrounding one or more enceto the accompanying diagrammatic drawlead-in wires led through theenvelope with the ing, given by way of example, in which use of glassintermediate pieces, the lead in Wires Figs. 1 and 2 are sectional viewsat right angles being connected by substantially flexible conof adischarge tube according to the invention. ductors to connectingcontacts on the protective Referring now to the figures, l designatesthe hood. This hood, which is shaped in the form metal tube envelope, 2an oval-shaped protective of a truncated cone having a generallyovalhood of hard glass, 3 designates-two incandescent shaped section isfor protecting the fragile seals cathode lead-in wires led through theenvelope I from mechanical damage. with the use of glass intermediatepieces 4. Sub- It has been found that, particularly if pulsatorystantially flexible conductors 5 provide connecvoltage differenceshaving a steep front occur tion to supply contacts 6 in the flat upperpart between the lead-in wire and the metal tube l of the protectivehood 2. Each of the wires 3 envelope, sparking may occur from thelead-in has secured to it a small metal spring 8 which wires to thelateral walls of the glass protective makes mechanical contact with theprotective hood. This sparking may occasion fusing of the hood 2. Thecooling fins of the metal tube are lead-in wires and losses anddisturbance in the designated 9.

operation of the tube. What I claim is:

According to the invention, a metal discharge An electric dischargeadapted to be operated tube comprisi g a metal envelope and for use atat very short wave-lengths comprising a metal very short wave-lengths inwhich a glass proenvelope, a plurality of lead-in conductors extectivehood surrounds one or more lead-in wires tending into said envelope, aglass protective hood led through the envelope of the tube andconsurrounding said lead-in conductors, supply connected bysubstantially flexibl conductors to tacts on the hood, a plurality offlexible conpp y contacts 011 the protective 110051, is charcluctorseach connecting one of the lead-in conacterized in that a conductorshaped in the form cluctors t one of i contacts, d a leafpring of asmall Spr ng is arranged between each conductor element interposedbetween each lead-in wire a d t e inner Surface of the Side lead-inconductor and the inner surface of said of the protective hood so as tobe in mechanical hood and in mechanical Contact th th contact therewith.EDUARD GERHARDUS DORGELO.

The incidence of sparking and arcing to the protective hood is thus atleast reduced even in No references cited,

the case of steep-fronted voltage diiierences

